<http://www.w3.org/1999/02/22-rdf-syntax-ns#first>
<http://ghk.h-cdn.co/assets/cm/15/11/54ffc05faa3d4-tubbs-1011-flexjr-b-traction.png>
<http://www.goodhousekeeping.com/institute/a23557/best-family-exercise-for-winter/?src=shelter_footer>